kauffeld



(No Model.) i 2 Sheets-Sheet 1; E. KAUFFELD.

COOLING AND REFRIGERATING APPARATUS.

No. 343,035. Patented June 1, 1886.

N. Ferias Phmmmgnvnnr, Wan-mmm, o. c,

(No Model.) 2 Sheets-Sheet 2.

E. KAUFFELD.

GooLING AND RBPRIGBRATING APPARATUS. No. 343,035. Patented'Ju'ne 1,1886.

NITED STATES PATENT Ormea..

ELIAS KAUFFELD, OF PITTSBURG,PENNSYLVANIA.

COOLING AND REFRIGERATING APPARATUS.

SPECIFECATION forming part of Letters Patent No. 343,035, dated June 1,1886. Application filed September 9, 1885. Serial No. 176,575. (Nomodel) To all whom, it may concern:

Beit known that I, ELIAS KAUFFELD, a citizen of the United States,residing at Pittsburg, in the county of Allegheny and State of Penn-Sylvania, haveinvented certain new and useful Improvements in Coolingand Refrigerating Apparatus; and I do hereby declare the following to bea full, clear, and exact description of the invention, such as willenable others skilled iu the art to which it appertains to make and usethe same.

My invention has relation to cooling orrefrigerating apparatus, and hasfor its object the provision of a comparatively simple and inexpensiveapparatus which maybe applied to ice-boxes or other cooling-chambers nowin use, and which will, by the mechanical conipression of air and thesubsequent cooling and expansion ofthe same, and with the expenditure ofbut little power, quickly reduce the temperature of an ice box, vessel,or chamber with which it is connected.

In carrying my invention into effect I propose to force the atmosphericair into a box or vessel having a surrounding wateijacket, and, havingproduced a sufficient degree of pressure within said vessel, allow thecom pressed and cooled air to escape suddenly and expand either directlyinto the chamber 'or vessel which is to be cooled or into suitable pipesarranged within the same. As au additional means for securing thedesired reduction of temperature in the refrigerati iigchamber, Ipropose to cause an attenuation of the air within the refrigeratingchamber or ves- Sel or in the air-conducting pipes arranged therein, andto this end I apply to the exit of such chamber, or the pipes therein, asuctionpump of suitable construction.

Having the above objects in view, my in ven tion consists in the novelconstruction, combination, and arrangement of partshereinafter 'fullydescribed and claimed.

Referring to the accompanying drawings, Figure l is a vertical sectionalView of a refrigerating-chalnber with my improved aircooling apparatusconnected therewith; Fig. 2, a top View of the same.

A designates the refrigerating chamber, which may be of any desired orsuitable forn1- as, for instance, an ordinary cooling-box, arefrigerator-car, or,in fact,any form or design of chamber whereinarticles or materials are to be cooled. Around three sides of thechamber A, the door of the chamber being on the fourth side, I place acontinuous line of serpentine pipes, a a a, which enter the chamber at cand leave the same at a?. Connected to the exit end a2 of the pipe a isa suction-pump, H, which may be of any desired form and operated eitherby hand or power, as may be found most desirable. Y l

B designates the air-cooling chamber, which may be arranged at anydesirable point in the vicinity of the refrigerating chamber, but

which for facility of illustration Ihave shown as being placed upon thetop of said chamber. Said box consists of two shells, B B2, placed onewithin the other, the outer shell, B', being l of iron or other suitablematerial, and the inner shell, B2, being for the purpose of securing arapid conduction of the heat from the air, of copper or other goodconductor of heat, and having rounded corners, as shown, so as towithstand the pressure of the air. The inner shell is mounted upon legsI I), leaving a water-space, C, all around, and is connected to apressure-gage, I), by a pipe, d.

E designates a water-supply pipe leading into the space O, and F auoverflow-pipe at the opposite end of the water-space, the former pipedipping down nearly to the -bottom of said water-space,while the latterhas its mouth vnearthc top of the same, so as to secure a p'ropercirculation of water around the shell B2. A diain-cocl{,f,.is placednear the bottom of the water-space, so as to permit `of drawing olf thewater when for any reason it is desired to empty the shell B, a suitablecock, e, being placed in the water-supply pipe E, so as to shut off thesupply when necessary.

G designates a pi pe which leads from the interior of the shell B'lthrough the water-space C, and outside the latter is divided into twobranches, G G2, each provided with a cut-oil' valve or cock, G. Thebranch G is connected directly with the pipe c, while the branch G leadsdirect] y into the i nterio'r of the refrigerat- Y ing-chamber.

Upon the pipe Ga govcrnouvalve, g,hav1ng a lever, g, and weight 921sarranged, and by means of Said governor-valve the amount of ICO From theabove description it will be seen that the air entering therefrigerating-chamber A can either be passed through the pipe a ordispersed throughout the chamber, or both simultaneously, in either casebeing attenuated and drawn ofi' by means of the suction-pump H. A smalldoor, k, is arranged near the bottom of the chamber A, for the purposeof permitting the entrance of a small amount of the external atmosphereshould the temperature within the chamber A become too low.

Upon the top of the chamber A,and near the water-box,is placed a smalldouble-acting airpump, I, having ingress-valvest' and egressvalves i ateach end. 'Ihe egress-valves t" fi lead into pipes '52, which bothconnect with a pipe, k', which leads directly into the interior of theshell B2.

Ldesignates the pitman of the air-pump,con nected at one end to thepiston-rod Z and at the other to a crank, on, upon a shaft, M. Saidshaft carries at its outer end a fly-wheel, N,to

` which is attached the rod O of atreadle, P. A

handle, o,is also secured upon the same pin as the treadle, so as toallow ofthe fly-wheel heilig turned by hand or foot power, or both.

The suctioirpump H can be operated by a similar device as that by whichthe force-pump is operated, or either or both pumps may be operated bysteam or gas engine or other available power; but in the drawings I haveshown the suction-pump operated by means of a beltconnection fromawheel, R, on the shaft M to a wheel, R', on the crankshaft of thesuction pump.

Having described my invention, what I de sire to clainnand secure byLetters Patent, is-

l. In a refrigerating orcooling apparatus,the combination, with aforce-pump and an air- 'reservoir connected thereto, said air-reservoirhaving a two branched pipe, one of said brano es leading directly into acooling-chamber and the other branch being connected to a coil of pipesinclosed in said cooling-chamber, of an exhaust-pump having atwo-branched connection leading, respectively, from said cooling-chamberand the coil of pipe contained in it, substantially as shown anddescribed.

2. In a refrigerating apparatus, the combination, with a force-pump andan air-reservoir having double wal1s,and water inlet and outlet pipesleading thereto, and a pipe leading from the interior of said reservoirto a refrigeratingchamber, of a pressure-regulating valve on theair-pipe between the air-reservoir and the refrigerating-chamber, a lineof pipe within the refrigerating chamber, and a suction-pump connectedto the extremity of said last-named pipe, substantially as described.

3. In a refrigerating apparatus, the combination,with a forcepump, anair-reservoir, and a pipe leading therefrom and provided with apressure-regulating valve, of branches leading from said air-pipe to arefrigeratiiig-chamber, one of said branches opening directly into saidchamber, while the other is connected with a line or coil of pipearranged within the chamber, substantially as described.

4. In a refrigerating o r cooling apparatus, the combi nation,with theforce-pump I,the doublewalled air-reservoir B, having a water-jacket`completely around it, the air-pipes G G2, and

the governor-valveg,of the refrigerating-chamber A, the line of pipe a,arranged therein, and t-he suction-pu mp H,connected to said line ofpipe, all constructed and arranged substantially as described.

In testimony whereof I have aixed my signature, in presence of twowitnesses, this 5th day of September, A. D. 1885.

ELIAS KAUFFELD.

Titnessesz J oHN F. AcroHEsoN, A. A. MOORE.

